Bhumindra's Stars
NorthernWidget/DS3231
Communicates between Arduino-programmed AVR and Maxim DS3231 RTC: splice of Ayars' (http://hacks.ayars.org/2011/04/ds3231-real-time-clock.html) and Jeelabs/Ladyada's (https://github.com/adafruit/RTClib) libraries
Electromed/EmSevenSegment
Arduino Library to control multiple seven segment displays using 4094 shift registers.